close connections on shutdown

gui/griffon-app/lifecycle/Shutdown.groovy

@@ -0,0 +1,25 @@
+
+import javax.annotation.Nonnull
+import javax.inject.Inject
+
+import org.codehaus.griffon.runtime.core.AbstractLifecycleHandler
+
+import com.muwire.core.Core
+
+import griffon.core.GriffonApplication
+import groovy.util.logging.Log
+
+@Log
+class Shutdown extends AbstractLifecycleHandler {
+    @Inject
+    Shutdown(@Nonnull GriffonApplication application) {
+        super(application)
+    }
+    
+    @Override
+    void execute() {
+        log.info("shutting down")
+        Core core = application.context.get("core")
+        core.shutdown()
+    }
+}